Quiet computing comes to rackmounts Antec's Studio Series rackmount enclosures offer rock-solid rackmount chassis ruggedness with Antec's famous Quiet Computing. Available in 3U and 4U sizes, these cases feature special 650-Watt, whisper-quiet power supplies, plus 92mm and 120mm fans for cool, quiet operation. Cooling is further enhanced by a unique segregated air-flow design. Backed by Antec's legendary 3-year warranty on all parts and labor, our Studio Series lets you power up, tune in, and enjoy! Drive Bays: 2 external 5.25 bays, 1 external, 3 internal 3.5 bays; 650W ATX12V v2.0 & EPS 12V Power Supply; Rubber grommets to absorb hard drive vibration; Power supply is isolated from the system to keep the system cooler; Front ports: 2x USB 2.0, 1x IEEE-1394a/FireWire; Cooling system: 1x 120mm TriCool, 1x 92mm TriCool; Unit Dimensions: 17 W x 5.2 H x 20.5 D, Net Weight: 25.7 pounds.